Title:
PRODUCTION OF OXIDE SUPERCONDUCTOR
Document Type and Number:
Japanese Patent JP3163122
Kind Code:
B2
Abstract:
PURPOSE: To provide a process for producing an oxide superconductor capable of increasing the critical current density of a Bi-based oxide superconductor in a magnetic field to a practical level.
CONSTITUTION: The objective superconductor can be produced by mixing 100 pts.vol. of Bi-based oxide superconductor powder with 1-40 pts.vol. of oxide powder having pinning action, e.g. powder of ZrO2, Cr2O3, NbO, NbO2, Al2O3, HfO2, MgO, TiO, CaO, NiO, SrO and Sc2O3, heating the mixed powder to a temperature T1i selected in the range of 800-900°C, sintering by slowly decreasing the temperature from T1i to a temperature T1f lower than T1i by 2-10°C spending a specific time, quenching the sintered material to a temperature T2 below 50°C and heat-treating the quenched product at a temperature T3 selected in the range of 400-700°C.
Inventors:
Torun Din Tan
Hisashi Yoshino
Manabu Kato
Shunji Nomura
Hisashi Yoshino
Manabu Kato
Shunji Nomura
Application Number:
JP19003491A
Publication Date:
May 08, 2001
Filing Date:
July 30, 1991
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
C01G1/00; C01G29/00; C04B35/00; C04B35/45; C04B35/64; H01B13/00; (IPC1-7): C04B35/64; C01G1/00
Domestic Patent References:
| JP3141512A | ||||
| JP1308803A | ||||
| JP353412A | ||||
| JP230655A | ||||
| JP2199057A |
Attorney, Agent or Firm:
Saichi Suyama (1 person outside)
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